Refractory liners and method for attaching such liners to coke oven doors



United States Patent Inventor James D. Little Pittsburgh, Pennsylvania Appl. No. 755,695 Filed Aug. 27, 1968 Patented Sept. 8, 1970 Assignee Koppers Company Inc.

a corporation of Delaware REFRACTORY LINERS AND METHOD FOR ATTACI'IING SUCH LINERS TO COKE OVEN DOORS 2 Claims, 2 Drawing Figs.

US. Cl 110/173 F23m 7/00 Field ofSearch 110/1731; 122/498; 110/99 [56] References Cited UNITED STATES PATENTS 2,070,547 2/1937 Grohn 110/173 2,3 87,594 10/1945 Longnecker 1 10/173 2,475,102 7/1949 Longacre I22/498X FOREIGN PATENTS 1,075,458 7/1967 Great Britain 122/498 Primary Examiner-Edward G. Favors Attorneys-Sherman H. Barber and Olin E. Williams ABSTRACT: Refractory lining for a coke oven door is hung on the surface of the door facing the coke oven chamber in such a way that the weight of the lining maintains it in place.

Patented Sept". 8, 1970 3,527,119

FiQZ.

INVENTOR. Jaws 0. LITTLE REFRACTORY LINERS AND METHOD FOR ATTACHING SUCH LINERS TO COKE OVEN DOORS BACKGROUND OF THE INVENTION Coke oven chambers are equipped with removable doors at each end, and the modern coke oven door is provided with a refractory lining to protect the steel structure from the heat developed in the coke oven. The refractory lining is,in many instances, sectionalized, but in other instances, the coke oven door lining is monolithic; being a one piece structure.

Various ways have been proposed in the prior art to hold the refractory lining to the surface of the door facing the coke oven chamber; the most usual installation being some sort ofa retainer frame that engages and holds the refractory lining shape or shapes, which frame is either welded, bolted, or riveted to the door panel.

From time to time, it is necessary to remove and replace the door lining as it wears, and such work can be very laborious due to the way the refractory shape or shapes is secured in the retainer frame. Those skilled in the art know that there is no simple way to remove and replace a door lining ofa coke oven door. Thus, those skilled in the art will recognize the features and advantages of the invention disclosed herein.

SUMMARY OF THE INVENTION Refractory lining sections for a coke oven door are supported on lugs mounted to the door and the weight of the lin ing sections acting on the lugs maintains the refractory lining sections in position.

For a further understanding of the invention and for features and advantages thereof, reference may be made to the following description when taken in conjunction with the drawing which shows for the purpose of exemplification one embodiment ofthe invention.

BRIEF DESCRIPTION OF THE DRAWING The invention is illustrated in the drawing wherein:

FIG. I is an exploded view of a sectionalized door lining in accordance with the invention; and

FIG. 2 is a sectional view showing a detail ofthe attachment of a liner section to the door.

DETAILED DESCRIPTION In FIG. I numeral 11 indicates the door plate ofa coke oven door, and a plurality of door lining sections 13, in particular four lining sections 13a, 13b, 13c, 13d, are shown; section 13b being removed in an exploded-view manner to illustrate the several cooperative parts.

The door plate 11 is a generally flat rectangular member to which are mounted, as by welding, lugs 15 having the shape suggested in FIG. 2. The lugs 15 are secured to the surface of v the door that faces the coke oven chamber and they extend generally outwardly and perpendicularly to that surface. The top edge 17 of the lugs slopes downwardly and toward the door plate, as shown in FIG. 2.

The door lugs 15 are arranged in groups of four although in some applications a larger or a smaller number of lugs maybe used. Each lug in each group is parallel to the other lugs in the group, and the four lugs 15 are located at the corners of a rectangle. The door refractory lining sections 13 are adapted to be mounted and hung on such lugs in the manner described hereinafter.

The door refractory lining section 13 is comprised of a flat generally rectangular lining retainer plate 19 to which are mounted a plurality of outwardly extending, spaced apart, U- shaped reinforcing bars 21. Each reinforcing bar 21 is secured as by welding to the lining retainer plate 19, and the reinforcing bars 21 are generally parallel to each other. Adjacent the corners of the lining retainer plate 19 are rectangular perforations 23, which are spaced apart so as to register with the lugs l5 mounted to the door plate 11.

The door refractory lining sections 13 have a usual door plug shape which is disposed toward the coke oven chamber.

Each lining section has four rectangular cavities 25 in the surface thatis adjacent the retainer plate 19. The lining sections 13 are made of suitable cast refractory material that surrounds the reinforcing bars 21 so that the refractory material is securely held to the retainerplate 19. The perforations 23 in the lining retainer plate 19 are slightly smaller in size than the cavities in the refractory lining, as may be noticed from FIG. 2. Thus, a portion 27 of the lining retainer plate 19 overlaps the'upper portion of each cavity 25. The width of the cavity 25 and the width of the perforation 23 are substantially equal, and the bottom of the perforation 23 is substantially level with the bottom of the cavity 25.

Those skilled in the art will recognize that in some instances the door panel 11 may be provided with sockets and that each lining section 13 may be provided with projections or lugs that coact with such sockets to support and maintain the lining sections in position relative to the door panel.

To assemble and repair the refractory lining 13 of a coke oven door in accordance with the invention, the several door lining sections 13 are merely removed and replaced on the door panel; each liner section being held in position merely by the force of gravity acting between the sloping upper surface of the lugs and the portion 27 of the lining retainer plate 19. It will be noted that the portion 27 of the lining retainer plate 19 rests on the sloping top surface of the lug l5, and the sections 13 are thereby maintained in contact with the door panel 11 by the force of gravity; the portions 27 sliding down the inclined upper edge of the lugs 15 until the lining retainer plate 19 is adjacent to or in contact with the door panel 11.

When installed, there is small space 29 between adjacent sections 13 which is provided to allow for expansion when the refractory lining is heated and to admit of easier removal of worn and damaged lining sections 13.

A feature of the invention is that no bolts or other type of fasteners are requiredto secure the refractory lining sections to the door panel.

A feature of the invention is that there is no lining retainer frame, as it is known in the prior art, which secures the lining sections to the door itself.

A feature of the invention is that the weight of each lining section, supported as it is on the sloping top surface of the supporting lugs, holds the lining sections in place against the door panel by the force of gravity.

A feature of the invention is that the individual refractory lining sections may be easily removed and replaced quickly and at less cost than can sections be removed and installed in the'manner known inthe prior art.

Although the invention has been described herein with a certain degree of particularity, it is understood that the present disclosure has been made only as an example and that the scope of the invention is defined by what is hereinafter claimed.

lclaim:

l. A refractory lining for a coke oven door of a coke battery comprising:

a. a plurality of lugs secured to and projecting outwardly from the surface of said door that faces the interior of said coke battery for holding refractory lining on said door;

b. a plurality of refractory lining sections on said door each section including:

i. a plate member having openings therein; and

ii. means securing refractory material to said plate member with cavities in said refractory material in registration with each said opening in said plate, and with c. said lining sections being cooperative with said lugs so that an edge of each opening in said plate member coacts with a respective lug and said lining section is held in position on said door with said plate member adjacent said door and said refractory facing the interior of said battery.

2. The invention of claim 1 wherein:

a. each of said lugs coacts with a side of said opening in said plate member and said refractory lining sections gravitate into position in said door. 

